1/* 2 * Copyright (C) 2010 Igalia S.L 3 * 4 * This library is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU Library General Public 6 * License as published by the Free Software Foundation; either 7 * version 2 of the License, or (at your option) any later version. 8 * 9 * This library is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 * Library General Public License for more details. 13 * 14 * You should have received a copy of the GNU Library General Public License 15 * along with this library; see the file COPYING.LIB. If not, write to 16 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 17 * Boston, MA 02110-1301, USA. 18 */ 19 20#include "config.h" 21#include "ImageGStreamer.h" 22 23#if ENABLE(VIDEO) && USE(GSTREAMER) 24 25#include "GStreamerUtilities.h" 26 27#include <cairo.h> 28#include <gst/gst.h> 29#include <gst/video/gstvideometa.h> 30 31 32using namespace std; 33using namespace WebCore; 34 35ImageGStreamer::ImageGStreamer(GstBuffer* buffer, GstCaps* caps) 36{ 37 GstVideoInfo videoInfo; 38 gst_video_info_init(&videoInfo); 39 if (!gst_video_info_from_caps(&videoInfo, caps)) 40 return; 41 42 // Right now the TextureMapper only supports chromas with one plane 43 ASSERT(GST_VIDEO_INFO_N_PLANES(&videoInfo) == 1); 44 45 if (!gst_video_frame_map(&m_videoFrame, &videoInfo, buffer, GST_MAP_READ)) 46 return; 47 48 unsigned char* bufferData = reinterpret_cast<unsigned char*>(GST_VIDEO_FRAME_PLANE_DATA(&m_videoFrame, 0)); 49 50 cairo_format_t cairoFormat; 51#if G_BYTE_ORDER == G_LITTLE_ENDIAN 52 cairoFormat = (GST_VIDEO_FRAME_FORMAT(&m_videoFrame) == GST_VIDEO_FORMAT_BGRA) ? CAIRO_FORMAT_ARGB32 : CAIRO_FORMAT_RGB24; 53#else 54 cairoFormat = (GST_VIDEO_FRAME_FORMAT(&m_videoFrame) == GST_VIDEO_FORMAT_ARGB) ? CAIRO_FORMAT_ARGB32 : CAIRO_FORMAT_RGB24; 55#endif 56 57 int stride = GST_VIDEO_FRAME_PLANE_STRIDE(&m_videoFrame, 0); 58 int width = GST_VIDEO_FRAME_WIDTH(&m_videoFrame); 59 int height = GST_VIDEO_FRAME_HEIGHT(&m_videoFrame); 60 61 RefPtr<cairo_surface_t> surface = adoptRef(cairo_image_surface_create_for_data(bufferData, cairoFormat, width, height, stride)); 62 ASSERT(cairo_surface_status(surface.get()) == CAIRO_STATUS_SUCCESS); 63 m_image = BitmapImage::create(surface.release()); 64 65 if (GstVideoCropMeta* cropMeta = gst_buffer_get_video_crop_meta(buffer)) 66 setCropRect(FloatRect(cropMeta->x, cropMeta->y, cropMeta->width, cropMeta->height)); 67} 68 69ImageGStreamer::~ImageGStreamer() 70{ 71 if (m_image) 72 m_image.clear(); 73 74 m_image = 0; 75 76 // We keep the buffer memory mapped until the image is destroyed because the internal 77 // cairo_surface_t was created using cairo_image_surface_create_for_data(). 78 gst_video_frame_unmap(&m_videoFrame); 79} 80#endif // USE(GSTREAMER) 81